The subscription is tied to the account that was used to sign up for the sponsorship offer and cannot be transferred to another account.
See the types that can be transferred here:
You can open a ticket here to speak with founders hub support: https://foundershub.startups.microsoft.com/signup?drawer_open=true please click on "Support" on this page
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola